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UNITED STATES PATEllT FFTCE.

NVM. W. HUBBELL, OF MOYAMENSING, PENNSYLVANIA, ASSIGNOR TO LEONARDPHLEGER.

CONSTRUCTION 0F APPARATUS FOR ARRESTING AND DEPOSITING SPARKS INLOCOMOTIVE STEAM-ENGINES, @5o.

Specification of Letters Patent No. 2,141, dated June 26, 1841.

To all idiom if may concern Be it known that I, VILLtAir XV. HtmnnLL, ofMoyamensing, in the county of Philadelphia and State of Pennsylvania,have invented a new and useful improvement in the manner of constructingspark arrester-s and depositors for preventing the escape of sparks fromlocomotive and other steam-engines and for depositing them in areceptacle prepared to contain them; and I do hereby declare that thefollowing is a full and eXactdescription thereof.

My spark arrester and depositor consists of a double cylinder which isattached to one side of the ordinary chimney, or smoke pipe, extendingup to the same height with it, and being nearly, or quite, equal to itin length. The outer case of this double cylinder is considerably largerthan the chimney, and may be double, or nearly double, its diameter.This outer cylinder, or case, of the arrester and depositor is not, ingeneral, a complete cylinder, although it may be so made, if preferred,but l usually so form it as that it is intersected along its wholelength by the smoke pipo, which is in part received within the body ofit, say to the distance of three or four inches.

l.Within the case of the arrester is a second cylinder, made of wiregauze, or of perforatedmetal, which inner cylinder may be six, or eightinches less in diameter than the outer case, so as to leave an annularspace between the two. The bottom of this inner cylinder' may be in acontinuous piece, or it may consist of a perforated plate, as may bepreferred. The inner cylinder is attached to the exterior, or case, bymeans of a cap plate, which incloses the space between them. The innercylinder is shorter than the outer, being about three fourths of itslength, leaving a space below for the reception of the sparks, cindersand ashes. The cylinder constituting the chimney, or smoke pipe, is cutaway at its upper end, on that side which is in contact with thearrester and depositor, in such manner as to admit of a free passage forthe heated air, smoke and sparks-from said chimney into the spacebetween the outer and inner cylinder of the arrester and depositor; andthe part of the inner cylinder of the latter which is opposite to theopening in the side of the chimney is leftsolid, not being perforatedlike the other parts, or the perforations are covered by a continuousplate, in order to distribute the heated air and sparks around andwithin the space between the two cylinders. The chimney, or smoke pipe,is furnished with a cap, or coter, which is to be closed when the engineis in operation, but which may be opened at other times.

In the accompanying drawings, Figure l, represents a part of the smokebox, and av longitudinal section of the chimney, and of the arrester anddepositor is the smoke box, and B, the bottom of Lhe chimney attached toit; the remaining part C, C, of the chimney, as well as the arrester anddepositor, is shown in section D, is the cover of the chimney, which isshown as closed, but which may be opened at pleasure by means of the rodE. l?, F, the case, or

outer cylinder, of the arrester and depositor,

andi?, G, the inner, or perforated cylinder, having its bottoni at il,The part I, l, of this cylinder, against which the sparks and the draftfrom the chimney first impinge, is not perforated. C, represents thetermination of the cylindrical chimney on the side toward the plate l,l, it being there cut away to allow the draft to escape laterally fromit into the space J, J. The space K, is the receptacle for sparks andashes, and M, a door for their removal when necessary. N, is theannularl cap which incloses the space J, J, and which connects the twocylinders; the upper end of the cylinder G, G, is left open for the freeescape of the draft.

F ig. 2, is a horizontal section through the line X, X, Fig. l, abovewhich the part a, a, of the chimney is cut away.

Fig. 3, is a top view of the chimney, and of the arrester and depositor,the respective parts of which are designated by the same letters as inFig. l.

Tn lF ig. 1i, the lower end of the cylinder G, is shown made in the formof an inverted cone, and as perforated. I, in general, place a plate ofmetal O, U, below the space J, J, which plate is funnel-formed, and hasan opening l), at its center, to conduct the cinders and ashes in to thereceptacle l. This device will tend to confine the action of the draftaround the inner cylinder, and to leave the cinders and ashes in aquiescent state in. the receptacle K. By this arrangement of the chimneyand of the arrester and depositor, the former not rendered top heavy, asis the case with most Vso other spark arresters and a less surface thanusual is exposed to the action of the Wind. Great advantage, also, isderived from the large surface of the casing F, F, Which is exposed tothe action of the external air, by which exposure it is made to condensea portion of the exhaust steam which is passed into the chimney asusual, and is forced along With the sparks, into the space J, J. rIhesesparks being` first forced against the imperforated part I, I, of thecylinder G, Gr, are carried by centrifugal force against the interior ofthe case F, F, instead of directly against the perforated cylinder, andthere, by the aid of the condensed steam, they are in part extinguished,are increased in weight, and fall down into the receptacle, while a freeand abundant space is presented for the escape of the draft through theperforated metal, 0r Wire gauze.

Having thus, fully described the nature of my invention, and explainedthe manner in which the same operates, I Will here remark that the formand arrangement of my apparatus may be varied Without departing from thegeneral principle upon which its operation is dependent. The chimney,for example, need not occupy part of the space J, J, but both it and thecase F, F, may be perfect cylinders, there being the necessarycommunication from one to the other at their upper ends. The perforatedcylinder G, Gr, may be replaced by a square, polygonal, or oval, tube;and other variations might be pointed out Which would still leave theinstrument substantially the same in construction and operation, and Ido not intend, therefore, to limit myself in these particulars; but

What I claim as constituting my invention, and desire to secure byLetters Patent is The manner in Which I have arranged and combined thechimney and the spark arrester and depositor; the chimney not beingsurrounded in any part by the arrester, but the tyvo being placed sideby side, and communicating with each other at their upper ends; and thearrester and depositor consisting of an outer case, an inner perforated,or Wire-gauze, cylinder, or tube, With an imperforated part Where thedraft first strikes it; and having a receptacle for cinders and ashes atits lower end; the Whole being constructed, arranged and combinedsubstantially in the manner, and for the purpose, herein fully set forthand made known.

INM. W. HUBBELL.

lVitnesses:

TI-Ios. P. JONES, JOHN C. JOHNSTON.

